Lesson 6
The Octal System
From eight to ten
Page 194
Your answer :
778
= 6310
3338
= 21910
5378
= 35110
6008
= 38410
⎫ ⎪ ⎪ ⎬ ⎪ ⎪ ⎭ This group contains a mistake.
Well, let’s check by writing the octal numbers in expanded form:
778
= 7( 81 ) + 7( 80 )
= 7( 8) + 7( 1) = 6310 ;
3338
= 3( 82 ) + 3( 81 ) + 3( 80 )
= 3( 64) + 3( 8) + 3( 1) = 21910 ;
5378
= 5( 82 ) + 3( 81 ) + 7( 80 )
= 5( 64) + 3( 8) + 7( 1) = 35110 ;
6008
= 6( 82 ) + 0( 81 ) + 0( 80 )
= 6( 64) + 0( 8) + 0( 1) = 38410 .
They’re all correct. Return to Page 182 and try again.
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